Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

joint connections in rectangular steel square tube trusses

joint connections in rectangular steel square tube trusses

joint connections in rectangular steel square tube trusses

I am looking for English, AISC, etc. references to assist in design check of connections between large square tube main cords of a truss made of rectangular steel tube and the lacing tubes.

The problem is that the square tube main cords are 16 x 16 x 5/8 with 6 x 6 x 3/8 tube diagonals and perpendiculars.

By first principals I cannot make the connections figure but the European who designed it says he has a reference that indicates the connections are fine.  I calculate big overloads in panels of main cords attached to lacing from loads perpendicular to the primary axis of the main cord.

Thanks for any assistance

RE: joint connections in rectangular steel square tube trusses

Try Design of Hollow Structural Section Connections by Packer and Henderson (Can. Institute of Steel Construction)

Then, you'll realize that there's no way that the connection you propose can work.  Ask the European designer to provide you with connection calcs, as well as the combined effect of local connection stresses and global truss stresses.  

First rule of engineering:

If it looks bad at first glance, it probably IS bad.


RE: joint connections in rectangular steel square tube trusses

Thanks for this info.  You have quoted my own major rule of thumb--if it looks bad, or feels bad, it probably is.

RE: joint connections in rectangular steel square tube trusses

I got the reference mentioned from CISC and found them very helpful and prompt.  Its a great reference.


Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close